Marine Weather and Tide Forecast for Herron Island, WA

SHORT TERM /TONIGHT THROUGH MONDAY/
Mostly clear skies this afternoon with quite a bit of cirrus blanketing western Washington. Highs on track to reach the low 70s across most of the region, with upper 60s along the coast. Mostly clear skies continue through the weekend with gradually cooling temperatures each day: highs in the mid to upper 60s, lows in the 40s. Onshore flow may be noticeably breezy at times Saturday and Sunday afternoon with gusts up to 25 to 30 mph, particularly west of Olympia and through the Strait of Juan de Fuca.

Split flow aloft this weekend with an upper level low to the south will give way to more zonal flow by Monday, allowing an upper level shortwave trough to skirt by to the north over British Columbia. This will bring an weak surface cold front across the area Monday night into early Tuesday, bringing for chances for light rain. Snow levels above 5500 to 6000 ft will mean rain for all mountain passes. Monday will also be the coolest day, with highs in the upper 50s to near 60.

LONG TERM /TUESDAY THROUGH FRIDAY/
Showers will gradually taper off through the day on Tuesday, with the best chances for rain continuing across the mountains. An upper level ridge will build in the system's wake Wednesday and continuing into Thursday, allowing for a return to warmer temperatures. Highs Thursday look to build to the low to mid 70s. Another upper level trough looks to approach the area Friday into next weekend, but there are differences in the timing as well as how far south the trough is expected to dig. In the forecast, slight chances for precipitation return Thursday night into Friday.

AVIATION
Dry weather across western WA tonight and Saturday as an upper level low spins to our south (over CA). The flow aloft is light and variable. Onshore flow will increase overnight with low level stratus clouds covering the coast (with IFR conditions likely). Low clouds will burn back offshore by mid to late morning. A stronger onshore push will bring stratus clouds farther inland Saturday night and Sunday. 33

KSEA...Gusty N winds through around 04Z to 10-15kt. Winds easing and becoming variable 09-12Z, then becoming W to SW by 18-21Z 5-10 kt. 33

MARINE
NW to W flow over the coastal waters and Strait of Juan de Fuca where Small Craft Advisories are in effect. Expect another strong push through the strait Saturday evening. A weak front will cross the waters later Monday and into Tuesday. 33

HYDROLOGY
No river flooding is expected over the next 7 days.



SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...Small Craft Advisory from 8 PM this evening to 5 AM PDT Saturday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory from 6 PM Saturday to 6 AM PDT Sunday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 6 PM PDT Saturday for Coastal Waters From Cape Flattery To James Island Out 10 Nm-Coastal Waters From James Island To Point Grenville Out 10 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm.

Small Craft Advisory from 5 PM this afternoon to 6 AM PDT Sunday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-Coastal Waters From James Island To Point Grenville 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm.